I have something "different" going on in the primary of a SNPA clone recipe. I did an identical batch about 4 days ahead and is doing fine. I repitched the 1056 from that but the head in the fermenter looks like melted ice cream instead of the usual Rocky Krausen i am used to. It's hard to explain the smell, sour, acidic, maybe vinagar? does not smell right. I'm thinking infection but would like some guidance as to specifically what it might be.
I did an AG cooler mash at a festival/ demonstration, and after chilling didnt pitch till the next day. I rinsed the carboy with the low-foam acid rinse a day or so before, and plugged the carboy with a stopper. Could that be the cause?